Open English Wordnet
Nouns
(n)focal ratio, f number, stop number, speedthe ratio of the focal length to the diameter of a (camera) lens system
(n)amphetamine, pep pill, upper, speeda central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression
Verbs
(v)rush, hotfoot, hasten, hie, speed, race, pelt along, rush along, cannonball along, bucket along, belt along, step on itmove hurridly“He rushed down the hall to receive his guests”, “The cars raced down the street”